REPAIR MATERIALS AND EXISTING STRUCTURE: DIVORCE OR SYMBIOSIS

Among the major problems facing us at the end of the Twentieth Century are the enormous infrastructural needs of a rapidly urbanizing world, the deterioration of concrete structures, the necessary repair of deficient concrete structures, the premature failure of repairs, and the need to improve the durability of rep in a cost-effective way. The durability of a repaired concrete structure and, thus, its service life depend on the quality of th composite system formed by the repair material and the existing reinforced concrete substrate. The behaviour and coexistence of t two components must be compatible if the repaired structure is to maintain the integrity of the original structure. This paper show that compared to other properties, the soundness of the repair ph i.e., the freedom from cracking, has a major impact on the long-t durability of repair systems. However, modern concrete repair practice does not pay adequate attention to the primary cause of cracking of repair materials, namely their dimensional incompatibility with existing concrete. This study demonstrates t the properties of cement-based repair materials have to be engine for dimensional compatibility with existing concrete to improve t resistance to cracking. The study also shows that although concre repair requires relatively simple technology, a repair becomes pa of a complex composite system that is sensitive to the quality of repair materials, the existing substrate, and the construction methods used. For the covering abstract see ITRD E117314.

• Corporate Authors:

  Federal Highway Administration

  Turner-Fairbank Highway Research Center, 6300 Georgetown Pike
  McLean, VA  United States  22101
• Authors:
  • Vaysburd, A M
  • McDonald, J E
  • Emmons, P H
• Conference:
  • PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON CORROSION AND REHABILITATION OF REINFORCED CONCRETE STRUCTURES HELD 7-11 DECEMB 1998, ORLANDO, FLORIDA, USA
• Publication Date: 1999

Language

• English

Media Info

• Features: References;
• Pagination: 21 p.

Subject/Index Terms

• TRT Terms: Cement; Conferences; Cracking; Durability; Maintenance; Prevention; Quality control; Reinforced concrete; Repairing
• Uncontrolled Terms: Quality
• ITRD Terms: 4758: Cement; 8525: Conference; 5211: Cracking; 5910: Durability; 3847: Maintenance; 9149: Prevention; 9063: Quality; 4794: Reinforced concrete; 3635: Repair
• Subject Areas: Maintenance and Preservation; Security and Emergencies;

Filing Info

• Accession Number: 00943267
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, , USDOT
• Created Date: Jun 11 2004 12:00AM